Commit | Line | Data |
---|---|---|
48f16b6a OS |
1 | /* |
2 | Some comments on the code.. | |
3 | ||
4 | - it shouldn't be necessary to use outb_p(). | |
5 | ||
6 | - ignoreirq creates a race condition. It needs to be fixed. | |
7 | ||
8 | */ | |
9 | ||
10 | /* | |
11 | comedi/drivers/das6402.c | |
12 | An experimental driver for Computerboards' DAS6402 I/O card | |
13 | ||
14 | Copyright (C) 1999 Oystein Svendsen <svendsen@pvv.org> | |
15 | ||
16 | This program is free software; you can redistribute it and/or modify | |
17 | it under the terms of the GNU General Public License as published by | |
18 | the Free Software Foundation; either version 2 of the License, or | |
19 | (at your option) any later version. | |
20 | ||
21 | This program is distributed in the hope that it will be useful, | |
22 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | GNU General Public License for more details. | |
25 | ||
26 | You should have received a copy of the GNU General Public License | |
27 | along with this program; if not, write to the Free Software | |
28 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
29 | ||
30 | */ | |
31 | /* | |
32 | Driver: das6402 | |
33 | Description: Keithley Metrabyte DAS6402 (& compatibles) | |
34 | Author: Oystein Svendsen <svendsen@pvv.org> | |
35 | Status: bitrotten | |
36 | Devices: [Keithley Metrabyte] DAS6402 (das6402) | |
37 | ||
38 | This driver has suffered bitrot. | |
39 | */ | |
40 | ||
25436dc9 | 41 | #include <linux/interrupt.h> |
48f16b6a OS |
42 | #include "../comedidev.h" |
43 | ||
44 | #include <linux/ioport.h> | |
45 | ||
46 | #define DAS6402_SIZE 16 | |
47 | ||
ecd89ddc | 48 | #define N_WORDS (3000*64) |
48f16b6a OS |
49 | |
50 | #define STOP 0 | |
51 | #define START 1 | |
52 | ||
53 | #define SCANL 0x3f00 | |
54 | #define BYTE unsigned char | |
55 | #define WORD unsigned short | |
56 | ||
57 | /*----- register 8 ----*/ | |
58 | #define CLRINT 0x01 | |
59 | #define CLRXTR 0x02 | |
60 | #define CLRXIN 0x04 | |
61 | #define EXTEND 0x10 | |
62 | #define ARMED 0x20 /* enable conting of post sample conv */ | |
63 | #define POSTMODE 0x40 | |
64 | #define MHZ 0x80 /* 10 MHz clock */ | |
65 | /*---------------------*/ | |
66 | ||
67 | /*----- register 9 ----*/ | |
68 | #define IRQ (0x04 << 4) /* these two are */ | |
69 | #define IRQV 10 /* dependent on each other */ | |
70 | ||
71 | #define CONVSRC 0x03 /* trig src is Intarnal pacer */ | |
72 | #define BURSTEN 0x04 /* enable burst */ | |
73 | #define XINTE 0x08 /* use external int. trig */ | |
74 | #define INTE 0x80 /* enable analog interrupts */ | |
75 | /*---------------------*/ | |
76 | ||
77 | /*----- register 10 ---*/ | |
78 | #define TGEN 0x01 /* Use pin DI1 for externl trigging? */ | |
79 | #define TGSEL 0x02 /* Use edge triggering */ | |
80 | #define TGPOL 0x04 /* active edge is falling */ | |
81 | #define PRETRIG 0x08 /* pretrig */ | |
82 | /*---------------------*/ | |
83 | ||
84 | /*----- register 11 ---*/ | |
85 | #define EOB 0x0c | |
86 | #define FIFOHFULL 0x08 | |
87 | #define GAIN 0x01 | |
88 | #define FIFONEPTY 0x04 | |
89 | #define MODE 0x10 | |
90 | #define SEM 0x20 | |
91 | #define BIP 0x40 | |
92 | /*---------------------*/ | |
93 | ||
94 | #define M0 0x00 | |
95 | #define M2 0x04 | |
96 | ||
97 | #define C0 0x00 | |
98 | #define C1 0x40 | |
99 | #define C2 0x80 | |
100 | #define RWLH 0x30 | |
101 | ||
0a85b6f0 MT |
102 | static int das6402_attach(struct comedi_device *dev, |
103 | struct comedi_devconfig *it); | |
da91b269 | 104 | static int das6402_detach(struct comedi_device *dev); |
139dfbdf | 105 | static struct comedi_driver driver_das6402 = { |
68c3dbff BP |
106 | .driver_name = "das6402", |
107 | .module = THIS_MODULE, | |
108 | .attach = das6402_attach, | |
109 | .detach = das6402_detach, | |
48f16b6a OS |
110 | }; |
111 | ||
7114a280 AT |
112 | static int __init driver_das6402_init_module(void) |
113 | { | |
114 | return comedi_driver_register(&driver_das6402); | |
115 | } | |
116 | ||
117 | static void __exit driver_das6402_cleanup_module(void) | |
118 | { | |
119 | comedi_driver_unregister(&driver_das6402); | |
120 | } | |
121 | ||
122 | module_init(driver_das6402_init_module); | |
123 | module_exit(driver_das6402_cleanup_module); | |
48f16b6a | 124 | |
c7b8bb98 | 125 | struct das6402_private { |
48f16b6a OS |
126 | int ai_bytes_to_read; |
127 | ||
128 | int das6402_ignoreirq; | |
c7b8bb98 BP |
129 | }; |
130 | #define devpriv ((struct das6402_private *)dev->private) | |
48f16b6a | 131 | |
0a85b6f0 MT |
132 | static void das6402_ai_fifo_dregs(struct comedi_device *dev, |
133 | struct comedi_subdevice *s); | |
48f16b6a | 134 | |
da91b269 | 135 | static void das6402_setcounter(struct comedi_device *dev) |
48f16b6a OS |
136 | { |
137 | BYTE p; | |
138 | unsigned short ctrlwrd; | |
139 | ||
140 | /* set up counter0 first, mode 0 */ | |
141 | p = M0 | C0 | RWLH; | |
142 | outb_p(p, dev->iobase + 15); | |
143 | ctrlwrd = 2000; | |
144 | p = (BYTE) (0xff & ctrlwrd); | |
145 | outb_p(p, dev->iobase + 12); | |
146 | p = (BYTE) (0xff & (ctrlwrd >> 8)); | |
147 | outb_p(p, dev->iobase + 12); | |
148 | ||
149 | /* set up counter1, mode 2 */ | |
150 | p = M2 | C1 | RWLH; | |
151 | outb_p(p, dev->iobase + 15); | |
152 | ctrlwrd = 10; | |
153 | p = (BYTE) (0xff & ctrlwrd); | |
154 | outb_p(p, dev->iobase + 13); | |
155 | p = (BYTE) (0xff & (ctrlwrd >> 8)); | |
156 | outb_p(p, dev->iobase + 13); | |
157 | ||
158 | /* set up counter1, mode 2 */ | |
159 | p = M2 | C2 | RWLH; | |
160 | outb_p(p, dev->iobase + 15); | |
161 | ctrlwrd = 1000; | |
162 | p = (BYTE) (0xff & ctrlwrd); | |
163 | outb_p(p, dev->iobase + 14); | |
164 | p = (BYTE) (0xff & (ctrlwrd >> 8)); | |
165 | outb_p(p, dev->iobase + 14); | |
166 | } | |
167 | ||
70265d24 | 168 | static irqreturn_t intr_handler(int irq, void *d) |
48f16b6a | 169 | { |
71b5f4f1 | 170 | struct comedi_device *dev = d; |
34c43922 | 171 | struct comedi_subdevice *s = dev->subdevices; |
48f16b6a OS |
172 | |
173 | if (!dev->attached || devpriv->das6402_ignoreirq) { | |
174 | printk("das6402: BUG: spurious interrupt\n"); | |
175 | return IRQ_HANDLED; | |
176 | } | |
177 | #ifdef DEBUG | |
178 | printk("das6402: interrupt! das6402_irqcount=%i\n", | |
0a85b6f0 | 179 | devpriv->das6402_irqcount); |
48f16b6a OS |
180 | printk("das6402: iobase+2=%i\n", inw_p(dev->iobase + 2)); |
181 | #endif | |
182 | ||
183 | das6402_ai_fifo_dregs(dev, s); | |
184 | ||
185 | if (s->async->buf_write_count >= devpriv->ai_bytes_to_read) { | |
186 | outw_p(SCANL, dev->iobase + 2); /* clears the fifo */ | |
187 | outb(0x07, dev->iobase + 8); /* clears all flip-flops */ | |
188 | #ifdef DEBUG | |
189 | printk("das6402: Got %i samples\n\n", | |
0a85b6f0 | 190 | devpriv->das6402_wordsread - diff); |
48f16b6a OS |
191 | #endif |
192 | s->async->events |= COMEDI_CB_EOA; | |
193 | comedi_event(dev, s); | |
194 | } | |
195 | ||
196 | outb(0x01, dev->iobase + 8); /* clear only the interrupt flip-flop */ | |
197 | ||
198 | comedi_event(dev, s); | |
199 | return IRQ_HANDLED; | |
200 | } | |
201 | ||
202 | #if 0 | |
da91b269 | 203 | static void das6402_ai_fifo_read(struct comedi_device *dev, short *data, int n) |
48f16b6a OS |
204 | { |
205 | int i; | |
206 | ||
207 | for (i = 0; i < n; i++) | |
208 | data[i] = inw(dev->iobase); | |
209 | } | |
210 | #endif | |
211 | ||
0a85b6f0 MT |
212 | static void das6402_ai_fifo_dregs(struct comedi_device *dev, |
213 | struct comedi_subdevice *s) | |
48f16b6a OS |
214 | { |
215 | while (1) { | |
216 | if (!(inb(dev->iobase + 8) & 0x01)) | |
217 | return; | |
218 | comedi_buf_put(s->async, inw(dev->iobase)); | |
219 | } | |
220 | } | |
221 | ||
0a85b6f0 MT |
222 | static int das6402_ai_cancel(struct comedi_device *dev, |
223 | struct comedi_subdevice *s) | |
48f16b6a OS |
224 | { |
225 | /* | |
226 | * This function should reset the board from whatever condition it | |
227 | * is in (i.e., acquiring data), to a non-active state. | |
228 | */ | |
229 | ||
230 | devpriv->das6402_ignoreirq = 1; | |
231 | #ifdef DEBUG | |
232 | printk("das6402: Stopping acquisition\n"); | |
233 | #endif | |
234 | devpriv->das6402_ignoreirq = 1; | |
235 | outb_p(0x02, dev->iobase + 10); /* disable external trigging */ | |
236 | outw_p(SCANL, dev->iobase + 2); /* resets the card fifo */ | |
237 | outb_p(0, dev->iobase + 9); /* disables interrupts */ | |
238 | ||
239 | outw_p(SCANL, dev->iobase + 2); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | #ifdef unused | |
0a85b6f0 MT |
245 | static int das6402_ai_mode2(struct comedi_device *dev, |
246 | struct comedi_subdevice *s, comedi_trig * it) | |
48f16b6a OS |
247 | { |
248 | devpriv->das6402_ignoreirq = 1; | |
249 | ||
250 | #ifdef DEBUG | |
251 | printk("das6402: Starting acquisition\n"); | |
252 | #endif | |
253 | outb_p(0x03, dev->iobase + 10); /* enable external trigging */ | |
254 | outw_p(SCANL, dev->iobase + 2); /* resets the card fifo */ | |
255 | outb_p(IRQ | CONVSRC | BURSTEN | INTE, dev->iobase + 9); | |
256 | ||
790c5541 | 257 | devpriv->ai_bytes_to_read = it->n * sizeof(short); |
48f16b6a OS |
258 | |
259 | /* um... ignoreirq is a nasty race condition */ | |
260 | devpriv->das6402_ignoreirq = 0; | |
261 | ||
262 | outw_p(SCANL, dev->iobase + 2); | |
263 | ||
264 | return 0; | |
265 | } | |
266 | #endif | |
267 | ||
da91b269 | 268 | static int board_init(struct comedi_device *dev) |
48f16b6a OS |
269 | { |
270 | BYTE b; | |
271 | ||
272 | devpriv->das6402_ignoreirq = 1; | |
273 | ||
274 | outb(0x07, dev->iobase + 8); | |
275 | ||
276 | /* register 11 */ | |
277 | outb_p(MODE, dev->iobase + 11); | |
278 | b = BIP | SEM | MODE | GAIN | FIFOHFULL; | |
279 | outb_p(b, dev->iobase + 11); | |
280 | ||
281 | /* register 8 */ | |
282 | outb_p(EXTEND, dev->iobase + 8); | |
283 | b = EXTEND | MHZ; | |
284 | outb_p(b, dev->iobase + 8); | |
285 | b = MHZ | CLRINT | CLRXTR | CLRXIN; | |
286 | outb_p(b, dev->iobase + 8); | |
287 | ||
288 | /* register 9 */ | |
289 | b = IRQ | CONVSRC | BURSTEN | INTE; | |
290 | outb_p(b, dev->iobase + 9); | |
291 | ||
292 | /* register 10 */ | |
293 | b = TGSEL | TGEN; | |
294 | outb_p(b, dev->iobase + 10); | |
295 | ||
296 | b = 0x07; | |
297 | outb_p(b, dev->iobase + 8); | |
298 | ||
299 | das6402_setcounter(dev); | |
300 | ||
301 | outw_p(SCANL, dev->iobase + 2); /* reset card fifo */ | |
302 | ||
303 | devpriv->das6402_ignoreirq = 0; | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
da91b269 | 308 | static int das6402_detach(struct comedi_device *dev) |
48f16b6a OS |
309 | { |
310 | if (dev->irq) | |
5f74ea14 | 311 | free_irq(dev->irq, dev); |
48f16b6a OS |
312 | if (dev->iobase) |
313 | release_region(dev->iobase, DAS6402_SIZE); | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
0a85b6f0 MT |
318 | static int das6402_attach(struct comedi_device *dev, |
319 | struct comedi_devconfig *it) | |
48f16b6a OS |
320 | { |
321 | unsigned int irq; | |
322 | unsigned long iobase; | |
323 | int ret; | |
34c43922 | 324 | struct comedi_subdevice *s; |
48f16b6a OS |
325 | |
326 | dev->board_name = "das6402"; | |
327 | ||
328 | iobase = it->options[0]; | |
329 | if (iobase == 0) | |
330 | iobase = 0x300; | |
331 | ||
332 | printk("comedi%d: das6402: 0x%04lx", dev->minor, iobase); | |
333 | ||
334 | if (!request_region(iobase, DAS6402_SIZE, "das6402")) { | |
335 | printk(" I/O port conflict\n"); | |
336 | return -EIO; | |
337 | } | |
338 | dev->iobase = iobase; | |
339 | ||
340 | /* should do a probe here */ | |
341 | ||
342 | irq = it->options[0]; | |
343 | printk(" ( irq = %u )", irq); | |
5f74ea14 | 344 | ret = request_irq(irq, intr_handler, 0, "das6402", dev); |
48f16b6a OS |
345 | if (ret < 0) { |
346 | printk("irq conflict\n"); | |
347 | return ret; | |
348 | } | |
349 | dev->irq = irq; | |
350 | ||
c3744138 BP |
351 | ret = alloc_private(dev, sizeof(struct das6402_private)); |
352 | if (ret < 0) | |
48f16b6a OS |
353 | return ret; |
354 | ||
c3744138 BP |
355 | ret = alloc_subdevices(dev, 1); |
356 | if (ret < 0) | |
48f16b6a OS |
357 | return ret; |
358 | ||
359 | /* ai subdevice */ | |
360 | s = dev->subdevices + 0; | |
361 | s->type = COMEDI_SUBD_AI; | |
362 | s->subdev_flags = SDF_READABLE | SDF_GROUND; | |
363 | s->n_chan = 8; | |
2696fb57 | 364 | /* s->trig[2]=das6402_ai_mode2; */ |
48f16b6a OS |
365 | s->cancel = das6402_ai_cancel; |
366 | s->maxdata = (1 << 12) - 1; | |
367 | s->len_chanlist = 16; /* ? */ | |
368 | s->range_table = &range_unknown; | |
369 | ||
370 | board_init(dev); | |
371 | ||
372 | return 0; | |
373 | } | |
90f703d3 AT |
374 | |
375 | MODULE_AUTHOR("Comedi http://www.comedi.org"); | |
376 | MODULE_DESCRIPTION("Comedi low-level driver"); | |
377 | MODULE_LICENSE("GPL"); |